通过触发饮用水管道中颗粒结合的有机物释放,PFAS促进了消毒副产品的形成
Xinyi Qin1, Yuan Zhuang1, Baoyou Shi1
1Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Water research
|March 3, 2024
概括
饮用水中的微量基和多基物质 (PFAS) 促进有机物质颗粒的释放,显著增加了有毒消毒副产品 (DBP) 的形成. 这项研究揭示了与PFAS和水系统中的松散沉积物相关的新风险.
科学领域:
- 环境化学环境化学
- 水质科学 水质科学
背景情况:
- 饮用水系统中的松散沉积颗粒是复杂的混合物,除了度之外,还存在未被认可的风险.
- 和多基基物质 (PFAS) 是饮用水中令人担忧的新出现的污染物.
研究的目的:
- 调查微量PFAS在饮用水中的松散沉积颗粒中形成消毒副产品 (DBPs) 的作用.
- 描述由PFAS影响的颗粒释放的有机物质,并确定其作为DBP前体的作用.
主要方法:
- 分析由PFAS引发的颗粒结合有机物释放.
- 使用有机碳/探测器和富里埃变态离子循环振质谱法 (FTICR-MS) 进行释放的有机物质的表征.
- 在有机物释放后评估颗粒表面特性变化 (功能组,粗度,尺寸).
主要成果:
- 微量PFAS通过释放与颗粒结合的有机物质,显著促进DBP的形成.
- 碳酸性PFAS增强了酸的形成;长链PFAS增加了三甲的释放.
- 释放的有机物质包括蛋白质,碳水化合物,素和芳香结构,作为DBP前体,特别是有毒芳香DBP.
- 变化的粒子表面特性,包括功能组的减少,粗度的增加和尺寸的减少.
结论:
- 除了它们本身的固有危害之外,PFAS在饮用水中增加了有毒DBP的形成,造成了双重风险.
- 松散的沉积颗粒作为有机物储存库,可以被PFAS调动,从而增加DBP风险.
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